Electrical Safety Devices for Warehouse Freight Elevators
The electrical safety devices of the freight elevator mainly include upper and lower limit switches, limit switches, overload protection, and door area photoelectric devices when necessary.
①The function of the limit switch is that when the warehouse freight elevator exceeds the normal travel range, the limit switch is driven by the plate installed on the lifting platform to cut off the circuit and force the freight elevator to stop.
②The limit switch is an electrical safety device that can cut off the safety circuit or forcibly cut off the main power supply before the elevator or the pair never touches the buffer when the warehouse freight elevator reaches the designated floor and the limit switch does not stop the elevator.
③ Overload protection is realized through the weighing device installed on the suspension structure of the lifting platform or the movable car. When the weight loaded in the lifting platform exceeds the rated load, a warning signal will be sent to remind the elevator operator, and the door will not be opened until the door is opened. Close the door until the weight of the goods in the car is not overloaded.
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